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Technical Data Sheet
PartsTable / COMPONENT / K4A
K4A ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

FILTER,RADIO FREQUENCY INTERFERE. Key specifications include material: STEEL CORROSION RESISTING OVERALL, base_style: WIRE LEADS, DOWN, bulb_style: T (TUBULAR), bore_diameter: 0.2500 INCHES NOMINAL IN, load_direction: RADIAL, overall_length: 1.062 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-142-4281, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
K4A
NSN: 3110-00-142-4281
FSC: 3110
CAGE: 21335 — TIMKEN CO DIV THE TIMKEN COMPANY (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
base_styleWIRE LEADS, DOWN
bulb_styleT (TUBULAR)
bore_diameter0.2500 INCHES NOMINAL IN
load_directionRADIAL
overall_length1.062 INCHES MAXIMUM IN
wattage_rating0.250 WATTS
bulb_designatorT-2
shield_quantity2
filling_gas_typeARGON
inner_ring_width0.2810 INCHES NOMINAL IN
outer_ring_width0.2190 INCHES NOMINAL IN
NSN3110-00-142-4281
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: K4A · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-3278 MIL SPEC SINGLE MATERIAL RESPONSE
•
INNER RING WIDTH: 0.2810 INCHES NOMINAL IN
•
SHIELD QUANTITY: 2
•
LOAD DIRECTION: RADIAL
•
OUTER RING WIDTH: 0.2190 INCHES NOMINAL IN
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
OVERALL OUTSIDE DIAMETER: 0.7500 INCHES NOMINAL IN
•
BORE DIAMETER: 0.2500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-3278 MIL SPEC SINGLE MATERIAL RESPONSE
INNER RING WIDTH0.2810 INCHES NOMINAL IN
SHIELD QUANTITY2
LOAD DIRECTIONRADIAL
OUTER RING WIDTH0.2190 INCHES NOMINAL IN
MATERIALSTEEL CORROSION RESISTING OVERALL
OVERALL OUTSIDE DIAMETER0.7500 INCHES NOMINAL IN
BORE DIAMETER0.2500 INCHES NOMINAL IN
STYLE DESIGNATORSINGLE ROW INNER RING EXTENDED BOTH SIDES
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
1374Interchangeable
interchangeable cross-reference
interchangeable
TR1179Interchangeable
interchangeable cross-reference
interchangeable
520869Interchangeable
interchangeable cross-reference
interchangeable
101-0316Interchangeable
interchangeable cross-reference
interchangeable
101C316Interchangeable
interchangeable cross-reference
interchangeable
1-2X4FIG137Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is K4A?
K4A is a FILTER,RADIO FREQUENCY INTERFERE.
What parts can replace K4A?
There are 25 known substitutes for K4A: 1374, TR1179, 520869 and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for K4A?
K4A is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-142-4281. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026